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Prosthetics - Midterm > TF Prosthetic Components and Suspension Systems (2) > Flashcards

TF Prosthetic Components and Suspension Systems (2) Flashcards

1
Q

stance control components should

A

use alignment as a means of increase or decrease stance control

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2
Q

types of stance components

A

polycentric knee

friction lock

manual lock

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3
Q

polycentric knee

A

axis is posterior

creates extension moment –> stability

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4
Q

frictional lock

A

locking produced by two surfaces mating when weight is borne on the knee

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5
Q

frictional lock –> wedge type

A

will prevent buckling of knee if knee is inadvertently flexed 20-25 degrees

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6
Q

the frictional lock doesnt

A

impede swing

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7
Q

advantage of frictional locks

A

increased stability

good for pts w/ weak mm

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8
Q

manual lock provides

A

max stability in stance

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9
Q

when does the manual lock lock

A

when pt stands, must manually unlock for sitting

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10
Q

manual lock advtantage

A

stable and simple

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11
Q

manual lock disadvantage

A

ambulation w/ locked knee

increase energy

poor cosmesis

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12
Q

purpose of extension aides

A

to assist in forward swing of the shank

prevent excessive heel rise

helpful taking short steps

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13
Q

micropressor knees

A

on board computer controls hydraulic fluid flow and adjusts channel widths

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14
Q

example of micropressor knee

A

rheo knee

ossur

C-leg - ottoboch

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15
Q

c-leg - ottoboch

A

adjusts to forces at the knee during swing and stance

makes 50 adjustments/second during gait cycle

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16
Q

c-leg - ottoboch battery life

A

25-30 hrs

17
Q

suspension

A

suction

18
Q

candidates for suction suspension

A

good residual limb shape/mm

good skin integrity

pressure tolerant skin

19
Q

suction suspension is

A

total contact

20
Q

what does suction suspension have

A

1-way valve air expelled in stance

may vary

suction w/ auxiliary support

21
Q

what doesnt the suction suspension have

A

external straps

prosthetic sock

22
Q

what holds the prosthesis on–> suction suspension

A

negative pressure

23
Q

what is used to pull RL into socket –> suction suspension

A

donning aide

can use lubricant to slide in

24
Q

advantages of suction suspension

A

no straps or belts

improved comfort and cosmesis

greater freedom of motion

increase use of remaining mm d/t more intimate and anatomical fit

decrease pistoning in socket

feels more attached/secure

25
Q

disadvantages to suction suspension

A

difficulty donning for some

more difficulty w/ fitting

not much allowance for volume changes

26
Q

suspension aides –> suction suspension

A

additional band may be needed to maintain socket and control rotation/ABD of socket

27
Q

other suspension aides

A

3S silicone suction suspension

flexiseal/power seal

TES belt

28
Q

3S silicone suction suspension

A

same as TT (silicone sleeve w/ shuttle lock)

29
Q

advantage of 3S silicone suction suspension

A

good for short TF

poor tolerance for full suction

30
Q

disadvantage of 3S silicone suction suspension

A

heat/weight

31
Q

flexiseal/power seal

A

from flex foot company

silicone ring in total suction socket

32
Q

TES belt

A

suspension aide neoprene sleeve used w/ partial or full suction

33
Q

advantage of TES belt

A

more comfortable than silesian bandage

security

more cosmetic

34
Q

disadvantage of TES belt

A

hot

increase bulk

Prosthetics - Midterm (8 decks)

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